﻿// The MIT License (MIT)
// 
// Copyright (c) 2015-2019 Rasmus Mikkelsen
// Copyright (c) 2015-2019 eBay Software Foundation
// https://github.com/eventflow/EventFlow
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using EventFlow.Extensions;
using EventFlow.MongoDB.ReadStores.Attributes;
using EventFlow.MongoDB.ValueObjects;
using System;
using System.Collections.Concurrent;
using System.Reflection;

namespace EventFlow.MongoDB.ReadStores
{
    public class ReadModelDescriptionProvider : IReadModelDescriptionProvider
    {
        private static readonly ConcurrentDictionary<Type, ReadModelDescription> CollectionNames
            = new ConcurrentDictionary<Type, ReadModelDescription>();

        public ReadModelDescription GetReadModelDescription<TReadModel>() where TReadModel : IMongoDbReadModel
        {
            return CollectionNames.GetOrAdd(
                typeof(TReadModel),
                t =>
                {
                    var collectionType = t.GetTypeInfo().GetCustomAttribute<MongoDbCollectionNameAttribute>();
                    var indexName = collectionType == null
                        ? $"eventflow-{typeof(TReadModel).PrettyPrint().ToLowerInvariant()}"
                        : collectionType.CollectionName;
                    return new ReadModelDescription(new RootCollectionName(indexName));
                });

        }
    }
}
